Chair-spider.



T "UNir n STATES? PATENT] OFFICE. 1

a To ctll whom it may concern:

HARRY W. BOLENS, or PORT WASHINGTON, WIsGOiTSIN,

- CHAIR-SPIDER.

'sriiorrrcarrolvr rmin part of Letters Patent No. ;702,769,1dated June17, 1902.

. I Application flea March 7,1902. SerialNo-97,(l80. (No model.) i

Be it known that I, HARRYW. BOLENS, a OllilZGIlfOf' the United'States, residing at Port Washington, in the co'untyof .Ozaukee and State of Wisconsin, have invented new'and: useful Improvements {in "Chair Spiders, of

' which thefollowing is a specification.

- This invention relates to improvements in chair-spiders, the objects of the invention being to improve the general details thereof,

: whereby thespider-arms, although formed of sheet metal and independent of the spread er,

yet may be supportedthereby inthe same horizontal plane, and fi'nally to so construct ed out in the claims;

; the said spreader is to adapt the seats for the spider-arms to serve as the limiting means for arresting the tilting of the spreader, and con Referringto the drawings, Figure 1 is a side elevation of a chair-spider embodying my in vention. Fig. 2, is a-plan view thereof. Fig. 3 is a perspective view in detail of the spreader.

Fig. 4is a central vertical sectional view of p the spider. v

Similar numerals of reference indicate similar parts in all the figures of'the drawings.

The threaded seat-post l may be of any desired construction, andformed on-or secured to the upper end thereof is the U-shaped yoke standards 3 tubularbosses? may be formed,.

or base of the spider. This yoke-shapedbase is preferably cast and may comprise theboss 2, from the opposid'e sides of whioh rise the side standards 3, having at their upper corners cut-away recesses orstop-notches 'e, in

advance of which the usual transverse apertures 5 are formed for the reception of the usual pintle 6. Between the rearedges of the as usual, for the accommodation of theinner ends of the helical return-springs 8. These bosses are spaced apart, and located therebetween is the adjusting or'tensionbolt or rod 9, the outer end of whioh is engaged by the I cross-piece 10, that engages-or receives the outer ends vof the said springs. The spreader.

or spreader-frame 11 is also'preferably cast, and comprises, preferably, a substantiallytriangular flat base 12, from which depends at opposite sides apairofapermred ears13,

the same beingsuch distance apart as will adaptthem toreadily. fit between the stand-;

I ards 3- of the spider. To giveproper strength tolthis spreader, a web 14a m'ayconne'ct. the Y rear edges of the depending'ears; The ears may furthermore bereduced and extended down inthe yoke of the spider to a point ad- J jacentthe transverse portion thereof, as at 15,

so that when saidspider, and consequently the seat, is in a horizontal position the extensions of theears abut against superficial lugs 16, formed on the rear faces of the two springreceiving bosses of the yoke. .Anapert'ured cross-piece 17 bears in' shallownotches ;18,

formed in the front edges of the extensions 15, and through the aperture of this piece extends the front threaded end of a handwheel ornut: 19, througha manipulation of which the aforesaid springs may be put and main-' i tained under proper tension;

, 'Alongthe back orrear edge of th'e'spreaderframe is formeda trough-like orj'ot'her shape of spider-arm se'at20, thesame being either continuous orinterrupted to save dress-v ing, as preferred, and from the center of this seat'in' the same plane' andl at right angles thereto there projects forwardlya companion spider-arm seat21, corresponding in shape with theseat 20.

The seats 20 and are perforated and support spider-arms 22 and 23, respectively.

These spider-arms are formed of sheet metal and are semitubular-orsubstantially Ushape in cross-section, thereby conforming to the shape in crosssection. of the seats in the spreader. The spider-arm 22 at its opposite endsis flattened and perforated to form attaching ends 24., while the front end'only of thearm 23 .is thusprovided. By'this arra-ngement there is thereforeproduced' a three-arm spider, the same possessing sub-' stantially all of the advantagesof that style of spider wherein the spider-arms, intersect attachingendap v It will be observed that the seat 20 may at its opposite ends projectashortdistance be-' yond the vertical planes of'the depending or cross each other, terminating in opposite.

pivot-ears of the spreader, thus forming stop-1 lugs 25, designed to'abut against the stop-recesses i, and thereby.v limit the rearward tilt.

of the spreader on its pintle and the chairseat, and consequently limit the degree to which the springs may be compressed. The spider-arms being supported in the same horizontal plane also terminate in a corresponding plane, thus avoiding the necessity of producing arms with greater curve to enable the one to pass under the other. as in instances where intersecting spider-arms have been employed.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. The combination, in a seat-spider, of a spreader provided with a pair of spider-arm seats locatedin the same horizontal plane and at an angle to each other, and spider-arms located in said seats and terminating in the same plane in attaching ends.

2. The combination, in a seat-spider, of a spreader provided with a pair of right-angularly-disposed spider-arm seats located in the same horizontal plane and substantially U- shaped in cross-section, and spider-arms 10- cated in the seats, said arms being semitubnlar or substantially U shape in cross-section and conforming to their seats and at their extremities terminating in attaching ends.

3. The combination, in a chair-spider, of a substantially U-shaped yoke, the opposite side standards of which are provided with stop-'notches, a spider-frame having depending ears pivoted between the standards, said spider-frame having a rear longitudinallydisposed seat extending beyond-the ears and opposite the recesses on their under sides forming stop-lugs for limiting the backward tilt of the spider, a transverse seat intersecting the said longitudinal seat of the spider, and spider-arms mounted upon and fitting the seats.

In testimony whereof I affix my signature in presence of two Witnesses.

HARRY W. BOLENS.

\Vitnesses:

T. A. BOERNER, ALBERT D. BOLENS. 

